发明申请
US20110187452A1 SOUND AND MUSIC PLAYBACK DEVICE 审中-公开
声音和音乐播放设备

SOUND AND MUSIC PLAYBACK DEVICE
摘要:
A sound and music playback device includes: an output amplifier; a power supply circuit that supplies electric power to the output amplifier; and an output signal level judging circuit; wherein an output voltage value of the power supply circuit is changed based on a level of a sound and music signal to be outputted.
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